Expansion joint



meansof a cooling .medium eirculated'about Patented Apr. v28, 19.25. i

UNITED -sl-TATES .PATENT OFFICE.

CARBON P. nUBBs, or wILIvInTT-n, ILLINo-Is, AssIcrNoR' 'roV UNIVERSAL OIL PRODUCTS COMPANY, on CHICAGO, ILLINOIS, A CORPORATION OF SOUTH DAKOTA.y

EXPANSION JOINT.

Application j iil'ed April 4,

To all whom it may concern:

Be it known that I, CARBON Dones, a'

citizen of the United States, residing inthe city of Wilmette, county of Cook, and State vof Illinois, have invented cer-tain new and useful Improvements in EXpansionJoints, of which the following is a specification.

This invention relates to improvements 1n expansion joints and refers more particularlyto an eX ansion joint adaptable forv use Where'the joint is subjected to high tem# peratures and pressures. I

Among the salient objects of the invention .are to provide a joint which permits the eX- pansion of the metals in the connect-ing tubes 'or pipes andin addition; is so constructed that high temperatures caused by the liquid lflowing' through the tubes will not affect, in any Way, the functioning of thejoint; to provideajoint which'is cooled by the functioning parts of the'joint and partic- 4 ularly thesealing parts so that the high temperatures or pressures will. not have such amarked effect on-the metal n or will it tend 'to quickly deteriorate' or dry up packing material used for keeping the joint tight.

Y 2 designate the pipes which are to be con-- The single figure .isa sectional view of ,the joint. I n

.Referring in detail to the drawing, 1 and nected so that the metal in .the connecting tubes ma be permitted to expand or contract wit out injuring in any way the apparatus. For this purpose an expansion 4 joint is interposed in the line. This expan- GII sion joint" comprises a flanged end piece 3 having a ,boss 4c and swedged in or otherwise united to the tube 2. This flange is connected to an abutting body member 5 by metnisA of bolts andv nuts 6. Sliding telescopically in this body member isa slip tube 7 .and a gland ring SsurrOunding the slip tube which islield in place by means of gland bolts 9 toconfine packing material 10 between the gland 8 and a shoulder formed in the body member as shown atll. A flanged portion 12' serves t hold the gmde members 13 which are bolted thereto by means of the bolts 14E. These guide mem'- bers arepositioned at regular .intervals (bout the body memberor if' desired may consist of a continuous ring, their function being to support theweight of thetconnection and guide properly the slip tube as 1t i921. snal Naas-8,371.

lmoves forward and backward with the eX- pansion and contraction of the metal. These guides'contact the flange 15 which is united to the tube 1. The slip tube 7 -hasa flanged portion 16 whichfis fixedly held in placein a Vanstone joint in the flange 15 by means of the retaining 'ring 17 and bolts and nuts 18.. lLimiting bolts 19 are positioned about the` peripheryof the joint screwed in the `ring 17 and having the limiting lnuts .20

abutting on a shoulder on the body member.

VVhen-liquid at aihigh temperature lis circulated through the system the joint will expand and contract telescopically sliding on theouter periphery of the slip tube with the expansion and contraction of the metal in the connecting tubes 1 and 2.- The packing shown at 10 serves'to maintain a pressure tight joint on the sliding surface.

Di-iiculties have been experienced `from time to time with expansion joints due to the fact that when a liquidvsubstance is at very high temperature, it tends to quickly dry out and soon make inedective the packing positioned at the solid connection'in the expansion' joint. The present invention is directed rto the maintenance of a lower temperature 'inside of thepacking and thereby reducing to av great extent. the deterioration that the high temperatures cause to the packinr material. For this purpose, the slip tube is divided'into. two annular compartments extending about the circumference .of the tube. Within the inner compartment 21 is placed an insulating material such as sil-ocel, kieselguhr, 'asbestos insulating material vor other infusible packings having like insulating characteristics. The outer compartment 22 is hollow and has fixed therein a continuous -helical 'bame member 23. Communicating with an eXtreme inner point in this compartment is an inlet tube, 24 which supplies a cooling circulating medium tothis compartment and due to the spiral baille me1nber,'this cooling medium is cir-- culated about the surface of the slip tube and internally thereof and passes out .through the outletl line 25. It is obvious that by circulating a cooling medium in this mannerV and having in addition' an insulating substance in the second compartment positioned internally of the circulating compartment, that the temperature to which the packing material 10 is1 subjected may be materially lowered and its life lengthened.

Particularly in systems where hydrocarbon oils or Athe like substance which must be raised to extremely high temperatures and circulated through apparatuses at these high temperatures, vexpansion joints of the described'construction eliminate difficulties due to leakage where a commontype of eXpansion joint is practically inoperative or its life is so short that the expense of their 'upk 'f with an elongated annular jacket therein around the exterior of which said packing seats, and means for introducinga cooling liquid to said jacket, said member also havmg the jacket and insulating material-disposed within said recess.

2. In an expansion joint, the combination with telescopic members, -a pipe connected to each of said members, a packing imposed between said telescopic members to permit -`relative movement thereof, while maintaining a sealed connection therebetween, one of said members being formed with-an interior and an exterior annular recess, said recesses extending throughout substantially the entire length of said telescopic member, said -with a body member recesses substantially the inner of said annular recesses being filled with an insulating material, means for introducing a cooling medium into the outer A annular recess at a point normally adjacentan annular' recess located interiorly of interior annular recess being filled with an insulating material, said exterior annular' recess adapted to receive al circulating cooling medium to prevent overheating of the joint.

8. In an expansion joint, the combination and a sliding tube member, a pipe connected to each of said mem'- bers, a packing mounted in the wall of said body member, said sliding tube member beingformed with two axially-spaced annular coextensive therewith,

said packing to'prevent overheating thereof,

4. In an expansion joint, thecombination with al body member and a sliding tube member, a pipe connected to' each of said members, packing material mounted in the wall of said body member and held therein byl a gland member, said sliding tube member adapted to be telescopically received within said body member with itsexterior wall in sliding engagement with said packing material, said sliding tube-member being formed with two axially spaced annular recesses substantially co-eXtensive therewith,

the inner of said recesses being filled withV an insulating material, means for continuously introducing a cooling liquid into the outer recess, and means for causing said liquid flow in a circuitous path vfrom the end of said sliding tube normally adjacent said packing to the opposite end thereof and means for discharging said cooling liquid.V

' CARBON P. DBBs. 

